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%I #9 Jul 28 2020 11:12:57
%S 0,40,2076,48316,620568,14777316,246091276,3081824360,43744483080,
%T 658808677292,8732713535100,101911005390840,1638761493877308,
%U 20319539313941196,274686278842189276
%N Number of (n+2)X5 0..1 arrays with all rows and columns having a strictly positive second derivative in a quadratic least squares fit
%e Some solutions for n=2
%e ..1..1..0..1..1....1..1..0..1..1....1..1..0..1..1....1..0..1..1..1
%e ..1..0..0..1..0....0..0..0..0..1....1..0..0..0..0....0..0..0..1..1
%e ..0..0..0..0..1....1..0..0..0..0....0..0..0..0..1....1..0..0..0..0
%e ..1..0..1..1..1....1..0..1..0..1....1..1..1..0..1....1..1..0..1..1
%Y Column 3 of A223179.
%K nonn,more
%O 1,2
%A _R. H. Hardin_, Mar 17 2013
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